Avogadro's number has a numerical value of
a. 6.02 × 10^23.
b. 1.00 × 10^23.
c. 3.01 × 10^23.
d. none of these.
a
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The daytime surface temperature of Mercury is higher than Earth's Moon's surface temperature because
a. clouds shield the Earth's Moon during the day. b. Mercury is farther from the Sun than the Earth's Moon. c. Mercury is closer to the Sun than the Earth's Moon. d. the atmosphere of the Earth's Moon has a strong greenhouse effect.
Suppose you are facing north and you see the Big Dipper close to your northern horizon, with Polaris (and the Little Dipper) above it. Where will you see the Big Dipper in six hours?
A) to the right of Polaris; that is, 90 degrees counterclockwise from its current position B) to the left of Polaris; that is, 90 degrees clockwise from its current position C) directly above Polaris D) still in the same place, below Polaris
as a guide, prepare a similar table showing the order of magnitudes of the thermal resistances of a unit area for convection between a surface and various fluids.
GIVEN • The order of magnitude of convective heat transfer coefficient ( h c) FIND • The order of magnitudes of the thermal resistance of a unit area (A Rc)
If the solubility of a compound is 72 grams per liter, how many grams of the compound will dissolve in 0.50 liters?
A) 36 g B) 72 g C) 144 g D) 30 g E) none of the above